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    <meta charset="UTF-8">
    <title>练习一</title>
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<div class="box">
    <div class="dl yi"><a  href="#">链接一</a></div>
    <div class="dl er"><a href="#">链接二</a></div>
    <div class="dl san"><a href="#">链接三</a></div>
    <div class="dl si"><a href="#">链接四</a></div>
    <div class="dl wu"><a href="#">链接五</a></div>
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